Refer to the exhibit.

A customer has configured Onboard in a cluster. After the Primary server’s failure, the BYOD devices fail to connect to the network .

Which step below is the best starting point when troubleshooting’
A . Verify the CPPM hostname in OSCP URL under TLS authentication method is updated
to localhost instead of primary server’s hostname.
B . Reboot the active ClearPass server and reconnect the client to the SSID by selecting the correct certificate when prompted.
C . Check if a DNS entry is available for the ClearPass hostname in the certificate, resolvable from the DNS server assigned to the client.
D . Check EAP certificate on the secondary node is issued by the same common root Certificate Authority (CA).

Answer: A